Signal Monitoring and Tracing with MATLAB

Signal visualization with and without real-time information

If you require only the signal value, not the time at which it reached that value, monitor the signal with MATLAB^®. See Signal Monitoring Basics.

If you require the signal value and the time at which it reached that value, add a real-time scope with MATLAB. SeeSignal Tracing Basics.

Objects

`SimulinkRealTime.target`	Represent real-time application and target computer status
`SimulinkRealTime.Instrumentation`	Create a real-time instrumentation object
`SimulinkRealTime.hostScope`	Display time-domain data on development computer screen
`SimulinkRealTime.targetScope`	Display time-domain data on target computer

Properties

Target Settings Properties

Settings related to target computer

Functions

`addscope`	Create a scope of specified type
`getscope`	Return scope identified by scope number
`remscope`	Remove scope from target computer
`addsignal (hostScope,signal)`	Add signals to host scope represented by scope object
`remsignal (hostScope,signal)`	Remove signals from host scope represented by scope object
`start (hostScope)`	Start execution of host scope on target computer
`stop (hostScope)`	Stop execution of host scope on target computer
`trigger (hostScope)`	Software-trigger start of data acquisition for host scope
`addsignal (targetScope,signal)`	Add signals to target scope represented by scope object
`remsignal (targetScope,signal)`	Remove signals from target scope represented by scope object
`start (targetScope)`	Start execution of target scope on target computer
`stop (targetScope)`	Stop execution of target scope on target computer
`trigger (targetScope)`	Software-trigger start of data acquisition for target scope

Topics

Background

Signal Monitoring Basics

Acquire non-time-stamped signal data while running a real-time application.

Signal Tracing Basics

Acquire and visualize signals while running a real-time application.

Target Scope Usage

Learn about usage issues that are unique to target scopes.

Host Scope Usage

Learn about usage issues that are unique to host scopes.

Scope Trigger Configuration

Learn about configuring scopes so that they wait until triggered to acquire data.

Pretriggering and Posttriggering of Scopes

Learn about configuring scopes so that they acquire data before or after the trigger event.

Trigger One Scope with Another Scope

Learn about configuring scopes so that they acquire data in response to the triggering of another scope.

Signal Monitoring

Monitor Signals with MATLAB Language

Acquire non-time-stamped signal data and display it in the Command Window.

Monitor Stateflow States with MATLAB Language

Monitor non-time-stamped Stateflow^® states in the Command Window.

Signal Tracing

Configure Target Scopes with MATLAB Language

Configure the scope display format on the target computer monitor.

Minimize Data Gaps with Two Scopes

Acquire data that two scopes acquire consecutively, with minimal overlap or gaps.

MATLAB Interface

Real-Time Application Objects

Use the MATLAB Command Window to change properties and control the target computer and your real-time application.

Real-Time Scope Objects

Use the Command Window to change properties and control signal logging and signal tracing.

Limitations

Troubleshoot Signals Not Accessible by Name

Investigate issues for some signal types prevent monitoring, tracing, or logging.

Internationalization Issues

Learn about Simulink^® Real-Time™ support for internationalization.

Troubleshooting

Troubleshooting in Simulink Real-Time

Troubleshoot problems that you encounter while using the Simulink Real-Time product

Related Information

Target Computer Configuration and Control Methods

Featured Examples

Signal Tracing With a Target Scope

Trace signals with an Simulink® Real-Time™ target scope. Target scopes are used to trace or display signals on a video monitor attached to the target computer. After the script builds and downloads the oscillator model, xpcosc, to the target computer, it adds four scopes of type 'target' to the application, each scope having a different acquisition DisplayMode. The four scopes are identified by the following scope numbers: 1, 3, 6, and 7. The signals 'Signal Generator' (oscillator input) and 'Integrator1' (oscillator output) are added to and displayed on each scope. scs(1): Scope # 1 is set to Redraw, Grid, FreeRun.

Open Script

Signal Tracing With a Host Scope in Freerun Mode

Do freerun signal tracing using an Simulink® Real-Time™ host scope. After the script builds and downloads the oscillator model, xpcosc, to the target computer, it adds a scope of type 'host' to the real-time application and the signals 'Integrator1' and 'Signal Generator' to the scope. The application is started and the host scope is used for data acquisition and display. Note: The model sample time is 250 usec.

Open Script

Pre- and Post-Triggering of a Host Scope

Pre- and post-triggering of a signal-triggered Simulink® Real-Time™ host scope. After the script builds and downloads the oscillator model, xpcosc, to the target computer, it adds a scope of type 'host' to the real-time application and the signals 'Integrator1' and 'Signal Generator' to the scope. The scope is then configured to trigger on the signal 'Signal Generator' when it reaches 0.0 on a rising slope (signal value goes negative to positive). Pre-triggering is set to 12 samples, meaning that the 12 samples collected prior to the trigger are also stored in the host scope data vector.

Open Script